There are two things that are striking about the report. First, nearly all of the recommendations proposed as means for reversing the declining annual mineral deposit discovery rate (and the declining discovery rate of the most valuable Tier 1 deposits, especially), have been held to be true within much of the mineral exploration industry for decades. (See, for example, Siegfried Muessig's short paper, "The Orefinders", first published in the SEG Newsletter in the late 1990s.) Perhaps the apparent inefficacy of these old internal views on the modern work of mineral exploration comes from upper management's deafness to them, or perhaps it comes from these views no longer being sufficient and adequate means -- given the gradual exhaustion of the easier to find low-hanging fruit -- for discovering economically-significant ore deposits. It's very probably a combination of these two possible explanations.
The second "striking" point could be causally related to the first in that the recommendations provided in the Boston Consulting Group report are largely a repetition of older, long-crystallized views. The report does not explore the possible effect of an aging mineral exploration work force on the mineral exploration crisis. Employment conditions in the industry have been in decline since the 1980s, so young geologists have been less and less motivated to enter and remain in the profession. With the consequently increasing average age of mineral exploration professionals, it seems likely that average problem-solving abilities have been gradually changing within the industry. With aging, the normal tendency is for fluid intelligence to decline and for crystallized intelligence to become more dominant. Fluid intelligence is that used to address novel problems like those constantly encountered in mineral exploration. In older people, traditional ways of approaching problems (crystallized intelligence) are maintained while problems that have not been previously encountered take them much extra time to figure out. See, for more discussion, "Cognitive skills and normal aging" at http://alzheimers.emory.edu/healthy_aging/cognitive-skills-normal-aging.html and the comparison of fluid and crystallized intelligence provided at https://en.wikipedia.org/wiki/Fluid_and_crystallized_intelligence. Perhaps at least some portion of the declining annual ore deposit discovery rate of the last decade or so reflects what time is doing to the average mineral exploration geologist because more youthful brains are justifiably shying away from the profession.